Question added by
محمد محمود عبد الحميد عثمان
, CONSULTANT CIVIL ENGINEER ( ROAD CONSTRUCTION) , CONTRACTOR OFFICE IN ELFAYOUM CITY
Date Posted: 2013/05/19
Try this link
http://docs.autodesk.com/ACD/2010/ENU/AutoCAD%202010%20User%20Documentation/index.html?url=WS1af5ffa23ce210c4a30acaf-59b5.htm,topicNumber=d0e164778